Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si Safety Protection Design: Made of all-aluminum alloy, the sturdy door reinforcement lock can withstand 800 lbs of force, fixed with 4 screws. Equipped with four long and four short screws, a total of 8 screws. A must-have choice for providing extra door security to . Easy to Install: The safety door lock can be installed within 5 minutes with an electric drill and a screwdriver. The family quickly gained a sense of security. The allows you to quickly unlock it under any circumstances to avoid accidents. Unlock in One Second: Reach out and press the upper and lower grooves of the reinforced door lock and pull horizontally to the fully unlocked state to unlock. Unlocking and locking can be completed within a second with a little contact. The most convenient and fast door security device. Childproofing and Tamper-resistan:This door has a spring-loaded design which can keep child safe. The child proof door locks can be installed higher on the door where your children can't reach! Plus, prevent child from opening the door to unknown people. Easy to Use: Place index finger on top of security door lock and thumb on bottom and slide lock from the base plate along the the direction of the hinges then pull outward.This security door lock no tools required to open, just a little practice.Not only prevent breaking in but also easy to open in case of emergency. Color: Silver Material: aluminium alloy Package Contents: 2 x Security Door Lock 8 x Screws Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.